Chapter 219 Magnetic Field Deflection Shield

Whenever new technology emerges, humans always think of using it in war.

Perhaps it is also the result of war concerns. When the positron cannon appeared, the senior officials of the Armament Department considered the defense problem, but unfortunately, no normal material can directly resist positrons.

Therefore, when the super-strong magnetic field appeared, the long-forgotten discussion topic was pulled back.

The positron cannon is a positron cluster weapon that can defend against charged particles, so it is easy to think of magnetic fields.

I learned in junior high school or ninth grade that charged particles moving in a magnetic field will be affected by the Lorentz force.

The direction of the Lorentz force follows the left-hand rule.

So it is easy to imagine the working principle of the magnetic shield, that is, to install two or more magnetic field generators on the warship, and then adjust the parameters of the magnetic field generator according to factors such as orientation, so as to form a large magnetic field that wraps the warship.

The technology has been achieved, but it is still a complex project.

Just like if you have reinforced concrete manufacturing technology, you still have to carry out various designs to build a building.

The same is true for magnetic field shields.

As we all know, charged particles will have different motion properties when they enter the magnetic field in different directions. The first is that charged particles enter the magnetic field in parallel. In this case, the particles are not affected by the Lorentz force, so they move in a uniform straight line.

The second is that charged particles enter the magnetic field vertically. In this case, the Lorentz force is always perpendicular to the velocity and acts as a centripetal force, so charged particles will move in a uniform circular motion under the action of the Lorentz force.

The third is that charged particles enter the magnetic field neither vertically nor parallel. In this case, the velocity needs to be split into the direction along the magnetic field and the direction perpendicular to the magnetic field. After analyzing the components and combining them, it will be found that the combined motion in this case is an equidistant spiral motion, and the trajectory is similar to that of a spring.

Compared with the first and second types, the third type is more suitable for complex combat environments. After all, no one can guarantee that the particle flow shot by the opponent is perpendicular to the magnetic field you set.

Of course, the real magnetic field shield is much more complicated than the third type, and it is not enough to just make a magnetic field generator.

Because it is necessary to take into account that the positron beam is shot from all directions, human scientists have added many adjustable magnetic flux line direction parameters to several magnetic field generators when designing magnetic field shields, and it cannot be just a single magnetic field.

Not only that, several magnetic field generators also need to satisfy the mutual magnetic flux lines to form a larger magnetic field, rather than a messy magnetic field.

In this way, the design requirements are much higher.

Various parameters must be accurate to an outrageous degree, such as where the magnetic field generator is placed, which of the several magnetic field generators needs to generate a stronger magnetic field, and how to fine-tune the direction of the magnetic flux lines when the warship moves or turns.

Such as these, all require scientists to experiment repeatedly. It is necessary to start with the experimental model and a small magnetic field. After obtaining these complete parameters, you can start to manufacture a magnetic field generator that is truly used for warships. It is impossible to say that you can build it and directly make a large magnetic field for the warship.

In addition, humans also need to consider one thing, that is, the problem of magnetization.

The so-called magnetization is the phenomenon that under the action of the magnetic field, the magnetic moments in the material tend to be aligned when they are arranged.

This is a very headache for humans.

Unlike people's imagination that only iron can be magnetized, in fact, everything can be magnetized. Because in the universe where we exist, almost all substances have magnetic moments.

As mentioned before, the strong magnetic field laboratory can make frogs levitate. This is actually the frog being magnetized in the 16T magnetic field.

The magnetic field shield suitable for warships is much stronger than this magnetic field, so humans have to consider the problem of magnetization of everything in the warship, including the human body.

It can be said that if the magnetization phenomenon is not considered. Then once the magnetic field shield is opened, before the opponent's positron cannon shoots over, the equipment and personnel inside the warship will be magnetized first, all electronic equipment will malfunction, and people exposed to the strong magnetic field will die.

Being killed by your own shield is a big joke.

So if the warship wants to install a magnetic field shield, it must be prepared to prevent magnetization.

So how to do it?

This is certainly not difficult for human scientists. Preventing magnetization is to shield the electromagnetic field, so the first thing scientists think of is magnetic shielding materials.

As the saying goes, only magic can defeat magic.

Humans use strong currents to generate strong magnetic fields to obtain magnetic field shields, so the only thing that can shield this electromagnetic field is the electromagnetic field.

As you can imagine, this electromagnetic shielding material is also made of metal materials.

Its basic principle is to confine electromagnetic waves to a certain area through metal shells, boxes, plates and other shielding bodies.

Of course, magnetic shielding of the entire interior is much more complicated than this.

Scientists need to know all the information about the magnetic field source, including where the field is generated in space, whether it is a single field or multiple fields superimposed, where the boundary between the far field and the near field is, the characteristics of the field source and the differences in propagation characteristics, the energy density of the field source, etc.

After mastering various parameters, scientists can analyze the fields generated by electric dipoles and magnetic poles, and then derive the far and near fields of the actual field source and the field characteristics of the wave resistance and far and near fields, thereby providing various corresponding parameters for the shielding field.

Only in this way can shielding materials, or shielding devices, that match the magnetic field shield be manufactured.

Yes, it is a material and a device, because the principle of magnetic shielding is to use high magnetic permeability materials to form a magnetic circuit, so that the interference magnetic field passes through the shielding body, thereby avoiding the interference of the interference magnetic field on the outside of the shielding body.

Specifically, when the shielding body is close to the magnetic field source, it will sense the magnetic field of the magnetic field source and generate a corresponding induced current in the shielding body.

This current will form an opposite magnetic field in the shielding body, and the opposite magnetic field will weaken the interference of the external magnetic field source on the magnetic field in the shielding body, thereby achieving the magnetic shielding effect.

Therefore, magnetic shielding and magnetic field shield must be under the same system. Because on the battlefield, the magnetic field shield cannot always maintain a magnetic flux line direction.

And this so-called magnetic shielding material is actually a superconducting material.

Therefore, it is obvious that the magnetic field shield generator cannot be placed in the center of the warship.

In the design of engineers, the magnetic field shield generator should be distributed in the front, back, top, and bottom of the warship, and located outside the warship's cabin and various equipment cabins.

So it is obvious that the layout of a warship equipped with a magnetic field shield should be like this. The outermost layer is the armor layer, on which various weapons and detectors are embedded. Inside the armor layer is the interlayer where the magnetic field generator is located, and further inside is the magnetic shielding layer made of superconducting material, followed by the shipborne equipment layer, then various thermal insulation layers, radiation protection layers, and finally the personnel activity layer.